n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 7 |
4 | 18 |
5 | 25 |
6 | 89 |
7 | 233 |
8 | 552 |
9 | 1559 |
10 | 4206 |
11 | 11455 |
12 | 31045 |
13 | 85231 |
14 | 232290 |
15 | 634523 |
16 | 1734730 |
17 | 4739443 |
18 | 12951941 |
19 | 35393517 |
20 | 96729068 |
21 | 264330489 |
22 | 722375126 |
23 | 1974122009 |
24 | 5394894605 |
25 | 14743271905 |
26 | 40290668634 |
27 | 110107068099 |
28 | 300902363502 |
[1,2,7,18,25,89,233,552,1559,4206,11455,31045, 85231,232290,634523,1734730,4739443,12951941, 35393517,96729068,264330489,722375126,1974122009, 5394894605,14743271905,40290668634,110107068099, 300902363502] |